how should OneHotEncoding be used? about spectre HOT 1 OPEN

OneHotEncoder factor returns multiple values by class, for example, if you encoding [1,2,2,3], it will return 3 values: [1, 0, 0, 0], [0, 1, 1, 0], [0, 0, 0, 1]

So just use slice []:

onehots = factors.WEEKDAY.one_hot()
for i in range(5):
    engine.add(onehots[i], "weekday{}".format(i+1))

btw: other factors such as RollingLinearRegression also return multiple values (slope and intercept)

from spectre.